A mechanical-electrokinetic battery using a nano-porous membrane
A mechanical-electrokinetic battery using a nano-porous membrane
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DOI：
10.1088/0960-1317/16/4/001
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发表时间：
2006-02
影响因子：
2.3
通讯作者：
Ming-Chang Lu;S. Satyanarayana;R. Karnik;A. Majumdar;Chi-Chuan Wang
中科院分区：
文献类型：
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作者：
Ming-Chang Lu;S. Satyanarayana;R. Karnik;A. Majumdar;Chi-Chuan Wang
本研究利用奈米多孔膜进行能量传递的分析与实验研究。计算结果表明，当电解质浓度低于某一临界值时，流动电位保持在一个饱和值。在通过该阈值后，流动电位随电解质浓度急剧衰减。效率随表面电荷密度的增加而增加，随浓度的降低而降低。通常，在较小的通道处可以实现较高的最大效率。然而，随着孔径的变化，会遇到最大效率。结果表明，纳米通道内的单极特性可以有效提高电池性能。我们的实验结果验证了分析结果;在我们的实验中，在标称孔径为200 nm、直径为2.1 cm、厚度为60 µm的氧化铝膜上获得的最佳效率为0.77%。通过使用标称20 nm孔径的氧化铝膜，最大输出能量为18 µW。
This study conducts an analytical and experimental investigation associated with energy transfer by using a nano-porous membrane. The calculated results indicate that the streaming potential held at a saturated value when the electrolyte concentration is below a certain critical value. After passing this threshold value, the streaming potential decays dramatically with the electrolyte concentration. The efficiency increased with an increase of surface charge density and with a decrease of concentration. Generally, higher maximum efficiency can be achieved at a smaller channel. However, as the pore diameter is varied, a maximum efficiency is encountered. The results indicate that the battery performance can be efficiently improved by the unipolar characteristic inside the nano-sized channel. Our experimental results verify the analytical results; the best efficiency obtained is 0.77% in our experiments at a nominal 200 nm pore size alumina membrane having a 2.1 cm diameter and a 60 µm thickness. The maximum output energy is 18 µW by using a nominal 20 nm pore size alumina membrane.